/Engine/Plugins/Editor/ObjectMixer/ObjectMixer/Source/ObjectMixer/Public/Views/List/Modes/ObjectMixerOutlinerMode.h
virtual [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [ISceneOutlinerHierarchy](API\Editor\SceneOutliner\ISceneOutlinerHierarchy) > CreateHierarchy()